File indexing completed on 2024-12-01 04:21:26

 /*
     Copyright (C) 2011-2018 Harald Sitter <sitter@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "mediaplayer.h"
 
 #include <QtCore/QDebug>
 #include <QtCore/QDir>
 #include <QtCore/QMetaType>
 #include <QtCore/QString>
 #include <QtCore/QTemporaryFile>
 #include <QtGui/QImage>
 
 #include <vlc/libvlc_version.h>
 
 #include "utils/libvlc.h"
 #include "media.h"
 
 // Callbacks come from a VLC thread. In some cases Qt fails to detect this and
 // tries to invoke directly (i.e. from same thread). This can lead to thread
 // pollution throughout Phonon, which is very much not desired.
 #define P_EMIT_HAS_VIDEO(hasVideo) \
     QMetaObject::invokeMethod(\
         that, "hasVideoChanged", \
         Qt::QueuedConnection, \
         Q_ARG(bool, hasVideo))
 
 #define P_EMIT_STATE(__state) \
     QMetaObject::invokeMethod(\
         that, "stateChanged", \
         Qt::QueuedConnection, \
         Q_ARG(MediaPlayer::State, __state))
 
 namespace Phonon {
 namespace VLC {
 
 MediaPlayer::MediaPlayer(QObject *parent)
     : QObject(parent)
     , m_media(0)
     , m_player(libvlc_media_player_new(pvlc_libvlc))
     , m_doingPausedPlay(false)
     , m_volume(75)
     , m_fadeAmount(1.0f)
 {
     Q_ASSERT(m_player);
 
     qRegisterMetaType<MediaPlayer::State>("MediaPlayer::State");
 
     libvlc_event_manager_t *manager = libvlc_media_player_event_manager(m_player);
     libvlc_event_type_t events[] = {
         libvlc_MediaPlayerMediaChanged,
         libvlc_MediaPlayerNothingSpecial,
         libvlc_MediaPlayerOpening,
         libvlc_MediaPlayerBuffering,
         libvlc_MediaPlayerPlaying,
         libvlc_MediaPlayerPaused,
         libvlc_MediaPlayerStopped,
         libvlc_MediaPlayerForward,
         libvlc_MediaPlayerBackward,
         libvlc_MediaPlayerEndReached,
         libvlc_MediaPlayerEncounteredError,
         libvlc_MediaPlayerTimeChanged,
         libvlc_MediaPlayerPositionChanged,
         libvlc_MediaPlayerSeekableChanged,
         libvlc_MediaPlayerPausableChanged,
         libvlc_MediaPlayerTitleChanged,
         libvlc_MediaPlayerSnapshotTaken,
         libvlc_MediaPlayerLengthChanged,
         libvlc_MediaPlayerVout,
         libvlc_MediaPlayerCorked,
         libvlc_MediaPlayerUncorked,
         libvlc_MediaPlayerMuted,
         libvlc_MediaPlayerUnmuted,
         libvlc_MediaPlayerAudioVolume
     };
     const int eventCount = sizeof(events) / sizeof(*events);
     for (int i = 0; i < eventCount; ++i) {
         libvlc_event_attach(manager, events[i], event_cb, this);
     }
 
     // Deactivate video title overlay (i.e. name of the video displaying
     // at start. Since 2.1 that is handled via the API which in general is more
     // reliable than setting it via libvlc_new (or so I have been told....)
     libvlc_media_player_set_video_title_display(m_player, libvlc_position_disable, 0);
 }
 
 MediaPlayer::~MediaPlayer()
 {
     libvlc_media_player_release(m_player);
 }
 
 void MediaPlayer::setMedia(Media *media)
 {
     m_media = media;
     libvlc_media_player_set_media(m_player, *m_media);
 }
 
 bool MediaPlayer::play()
 {
     m_doingPausedPlay = false;
     return libvlc_media_player_play(m_player) == 0;
 }
 
 void MediaPlayer::pause()
 {
     m_doingPausedPlay = false;
     libvlc_media_player_set_pause(m_player, 1);
 }
 
 void MediaPlayer::pausedPlay()
 {
     m_doingPausedPlay = true;
     libvlc_media_player_play(m_player);
 }
 
 void MediaPlayer::resume()
 {
     m_doingPausedPlay = false;
     libvlc_media_player_set_pause(m_player, 0);
 }
 
 void MediaPlayer::togglePause()
 {
     libvlc_media_player_pause(m_player);
 }
 
 void MediaPlayer::stop()
 {
     m_doingPausedPlay = false;
 #ifdef __GNUC__
 #warning changed to stop_async does this have impliciations
 #endif
 #if (LIBVLC_VERSION_INT >= LIBVLC_VERSION(4, 0, 0, 0))
     libvlc_media_player_stop_async(m_player);
 #else
     libvlc_media_player_stop(m_player);
 #endif
 }
 
 qint64 MediaPlayer::length() const
 {
     return libvlc_media_player_get_length(m_player);
 }
 
 qint64 MediaPlayer::time() const
 {
     return libvlc_media_player_get_time(m_player);
 }
 
 void MediaPlayer::setTime(qint64 newTime)
 {
 #if (LIBVLC_VERSION_INT >= LIBVLC_VERSION(4, 0, 0, 0))
     libvlc_media_player_set_time(m_player, newTime, false /* not fast, but precise */);
 #else
     libvlc_media_player_set_time(m_player, newTime);
 #endif
 }
 
 bool MediaPlayer::isSeekable() const
 {
     return libvlc_media_player_is_seekable(m_player);
 }
 
 bool MediaPlayer::hasVideoOutput() const
 {
     return libvlc_media_player_has_vout(m_player) > 0;
 }
 
 bool MediaPlayer::setSubtitle(int subtitle)
 {
     return libvlc_video_set_spu(m_player, subtitle) == 0;
 }
 
 bool MediaPlayer::setSubtitle(const QString &file)
 {
     return libvlc_media_player_add_slave(m_player,
                                          libvlc_media_slave_type_subtitle,
                                          file.toUtf8().data(),
                                          true) == 0;
 }
 
 void MediaPlayer::setTitle(int title)
 {
     libvlc_media_player_set_title(m_player, title);
 }
 
 void MediaPlayer::setChapter(int chapter)
 {
     libvlc_media_player_set_chapter(m_player, chapter);
 }
 
 QImage MediaPlayer::snapshot() const
 {
     QTemporaryFile tempFile(QDir::tempPath() % QDir::separator() % QStringLiteral("phonon-vlc-snapshot"));
     tempFile.open();
 
     // This function is sync.
     if (libvlc_video_take_snapshot(m_player, 0, tempFile.fileName().toLocal8Bit().data(), 0, 0) != 0)
         return QImage();
 
     return QImage(tempFile.fileName());
 }
 
 bool MediaPlayer::setAudioTrack(int track)
 {
     return libvlc_audio_set_track(m_player, track) == 0;
 }
 
 void MediaPlayer::event_cb(const libvlc_event_t *event, void *opaque)
 {
     MediaPlayer *that = reinterpret_cast<MediaPlayer *>(opaque);
     Q_ASSERT(that);
 
     // Do not forget to register for the events you want to handle here!
     switch (event->type) {
     case libvlc_MediaPlayerTimeChanged:
         QMetaObject::invokeMethod(
                     that, "timeChanged",
                     Qt::QueuedConnection,
                     Q_ARG(qint64, event->u.media_player_time_changed.new_time));
         break;
     case libvlc_MediaPlayerSeekableChanged:
         QMetaObject::invokeMethod(
                     that, "seekableChanged",
                     Qt::QueuedConnection,
                     Q_ARG(bool, event->u.media_player_seekable_changed.new_seekable));
         break;
     case libvlc_MediaPlayerLengthChanged:
         QMetaObject::invokeMethod(
                     that, "lengthChanged",
                     Qt::QueuedConnection,
                     Q_ARG(qint64, event->u.media_player_length_changed.new_length));
         break;
     case libvlc_MediaPlayerNothingSpecial:
         P_EMIT_STATE(NoState);
         break;
     case libvlc_MediaPlayerOpening:
         P_EMIT_STATE(OpeningState);
         break;
     case libvlc_MediaPlayerBuffering:
         QMetaObject::invokeMethod(
                     that, "bufferChanged",
                     Qt::QueuedConnection,
                     Q_ARG(int, event->u.media_player_buffering.new_cache));
         break;
     case libvlc_MediaPlayerPlaying:
         // Intercept state change and apply pausing once playing.
         if (that->m_doingPausedPlay) {
             that->m_doingPausedPlay = false;
             // VLC internally will call stop if a player can not be paused, this
             // can lead to deadlocks as stop is partially blocking, to avoid this
             // we explicitly do a queued stop whenever a player can not be paused.
             // In those situations pausedplay capability can not be provided, so
             // applications wanting to do pausedplay will need to handle it anyway
             // as faking a paused state when there is none would be a very code
             // intense workaround asking for weird abstraction leakage.
             // See kde bug 337604.
             if (libvlc_media_player_can_pause(that->m_player)) {
                 that->pause();
             } else {
                 QMetaObject::invokeMethod(that, "stop", Qt::QueuedConnection);
             }
         } else
             P_EMIT_STATE(PlayingState);
         break;
     case libvlc_MediaPlayerPaused:
         P_EMIT_STATE(PausedState);
         break;
     case libvlc_MediaPlayerStopped:
         P_EMIT_STATE(StoppedState);
         break;
     case libvlc_MediaPlayerEndReached:
         P_EMIT_STATE(EndedState);
         break;
     case libvlc_MediaPlayerEncounteredError:
         P_EMIT_STATE(ErrorState);
         break;
     case libvlc_MediaPlayerVout:
         if (event->u.media_player_vout.new_count > 0) {
             P_EMIT_HAS_VIDEO(true);
         } else {
             P_EMIT_HAS_VIDEO(false);
         }
         break;
     case libvlc_MediaPlayerMediaChanged:
         break;
     case libvlc_MediaPlayerCorked:
         that->pause();
         break;
     case libvlc_MediaPlayerUncorked:
         that->play();
         break;
     case libvlc_MediaPlayerMuted:
         QMetaObject::invokeMethod(
                     that, "mutedChanged",
                     Qt::QueuedConnection,
                     Q_ARG(bool, true));
         break;
     case libvlc_MediaPlayerUnmuted:
         QMetaObject::invokeMethod(
                     that, "mutedChanged",
                     Qt::QueuedConnection,
                     Q_ARG(bool, false));
         break;
     case libvlc_MediaPlayerAudioVolume:
         QMetaObject::invokeMethod(
                     that, "volumeChanged",
                     Qt::QueuedConnection,
                     Q_ARG(float, event->u.media_player_audio_volume.volume));
         break;
     case libvlc_MediaPlayerForward:
     case libvlc_MediaPlayerBackward:
     case libvlc_MediaPlayerPositionChanged:
     case libvlc_MediaPlayerPausableChanged:
     case libvlc_MediaPlayerTitleChanged:
     case libvlc_MediaPlayerSnapshotTaken: // Snapshot call is sync, so this is useless.
     default:
         break;
         QString msg = QString("Unknown event: ") + QString::number(event->type);
         Q_ASSERT_X(false, "event_cb", qPrintable(msg));
         break;
     }
 }
 
 QDebug operator<<(QDebug dbg, const MediaPlayer::State &s)
 {
     QString name;
     switch (s) {
     case MediaPlayer::NoState:
         name = QLatin1String("MediaPlayer::NoState");
         break;
     case MediaPlayer::OpeningState:
         name = QLatin1String("MediaPlayer::OpeningState");
         break;
     case MediaPlayer::BufferingState:
         name = QLatin1String("MediaPlayer::BufferingState");
         break;
     case MediaPlayer::PlayingState:
         name = QLatin1String("MediaPlayer::PlayingState");
         break;
     case MediaPlayer::PausedState:
         name = QLatin1String("MediaPlayer::PausedState");
         break;
     case MediaPlayer::StoppedState:
         name = QLatin1String("MediaPlayer::StoppedState");
         break;
     case MediaPlayer::EndedState:
         name = QLatin1String("MediaPlayer::EndedState");
         break;
     case MediaPlayer::ErrorState:
         name = QLatin1String("MediaPlayer::ErrorState");
         break;
     }
     dbg.nospace() << "State(" << qPrintable(name) << ")";
     return dbg.space();
 }
 
 void MediaPlayer::setAudioFade(qreal fade)
 {
     m_fadeAmount = fade;
     setVolumeInternal();
 }
 
 void MediaPlayer::setAudioVolume(int volume)
 {
     m_volume = volume;
     setVolumeInternal();
 }
 
 bool MediaPlayer::mute() const
 {
     return libvlc_audio_get_mute(m_player);
 }
 
 void MediaPlayer::setMute(bool mute)
 {
     libvlc_audio_set_mute(m_player, mute);
 }
 
 void MediaPlayer::setVolumeInternal()
 {
     libvlc_audio_set_volume(m_player, m_volume * m_fadeAmount);
 }
 
 void MediaPlayer::setCdTrack(int track)
 {
     if (!m_media)
         return;
 #ifdef __GNUC__
 #warning changed to stop_async does this have impliciations
 #endif
 #if (LIBVLC_VERSION_INT >= LIBVLC_VERSION(4, 0, 0, 0))
     libvlc_media_player_stop_async(m_player);
 #else
     libvlc_media_player_stop(m_player);
 #endif
     m_media->setCdTrack(track);
     libvlc_media_player_set_media(m_player, *m_media);
     libvlc_media_player_play(m_player);
 }
 
 void MediaPlayer::setEqualizer(libvlc_equalizer_t *equalizer)
 {
     libvlc_media_player_set_equalizer(m_player, equalizer);
 }
 
 } // namespace VLC
 } // namespace Phonon